Working for large corporation - £120k - 3 days in the office in London Basic Qualifications 10+ years of hands-on technical experience with Mainframe systems and technologies such as Cobol, JCL, Assembler, PL/I, RPG, Rexx, CICS, DB2, IMS DB, IMS DC, VSAM, Adabas/Natural Experience on distributed Client Server architecture systems, with proficiency in technologies such as Java, .NET, and experience with modern Front End frameworks such as Angular, React, Vue. Knowledge of cloud migration and modernization approaches and patterns on various hyperscaler platforms such as Amazon Web Services, Microsoft Azure, Google Cloud Platform, VMWare Tanzu, IBM OpenShift, Oracle Cloud. Preferred Qualifications 15+ years designing architectures for mission-critical, large-scale transaction processing and batch applications on IBM z/IBM i systems. Experience with AI-assisted code relearning and conversion tools, automated modernization frameworks, and agentic AI orchestration. Familiarity with AWS Mainframe Modernization tools, AWS Transform, IBM Watson Code Assistant for z and similar hyperscaler offerings. Knowledge of event-driven architectures, Strangler Fig patterns, and agentic AI-based modernization approaches. Hands-on experience with containerization and orchestration platforms (Kubernetes, OpenShift). Familiarity with modern application frameworks (Spring Boot, Angular, React, Vue). Experience implementing event-driven microservices, API gateways, and serverless architectures. ..... full job details .....